Electrical switch instrumentality.



ELECTRICAL SWITCH INSTRUMENTALITY. APPLICATION FILED FEB. l2, |916.

H.F.KRANTZ.

Patented Deo. 18, 1917.

H. F. K'RANTZ.

ELECTRICAL SWITCH INSTRUMENTALITY. APPLICATION FILED FEB. 12. 1916.

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HUBERT vIi". KRANTZ, 0F BRQKLYN, NEW' TIGRE.

ELECTRICAL SWITCH IhTSTRUMENTALITY.

Specification of Letters Patent. Patented Bee.. 18, 'ligt' Y.,

@riginal application filed March 13, 1915, Serial No. 14,130. Renewedapril 11, 1916, Serial No. 90,159. Divided and this application filedFebruary l2, 1916. Serial No. 77,878.

fb uZZ whom it, may concern.'

lle it l'inown that l, HUBERT F. KRANTZ, a citizen of the United States,and residing at Brooklyn, in the county of Kings and State of New York,have invented a new,

and Improved Electrical Switch lnstrumentality, of which the followingis a full disclosure.

This invention is a division'of my copend ing'case No. 14,130 tiledMarch 13, 1915,

and renewed April l1, 1916, Serial No. 90,519, and its subject-matter ismore espe cially directed to a switch-operating instrumentality soconstructed as to harmonize.

with a simplified arrangement of a panel- `board of the type enablingone or more branclrline circuits to be connected or dis connected withthe main supply or with bus bars connected therewith. y

- Among the objects of this invention are, (a) to create a compactfew-part switchniovinp; mechanism conducive to a greatly simpliied panelboard arrangement; (b) to provide a switch-mechanism especially suitable for direct coperation with the various branclnline connections; and(c) to provide a switch-mechanism peculiarly well adapted for actuationmanually or otherwise from the front face of a panel board and havingall parts save the operating,` handles located out of sight, anddesigned in a manner simple and durable yet capable oty carryinexcessive currents and of making ve y quick breaks.

Other objects will be in part obvious from the annexed drawings and inpart indicated in connection therewith by the following analysisof thisinvention.

This invention accordingly consists in the features of construction,combinations of parts, and in lthe unique relations of the members andin the relative proportioning and disposition thereof; all as morecompletely outlined herein.

To enable others skilled in the art so fully to comprehend the4underlying features thereof that they may embody the same by thenumerous modifications in structure and relation contemplated by thisinvention, drawings depicting a prcferreddform have been annexed as apart of this disclosure, and in such' drawings, like characters ofreference denote corresponding parts throughout all the views of whichswitch mechanism constriictcd in accordance with this invention andshowing the saine the arrangement.

- Fig. 2 is a sectional View taken substan tially upon the plane. ofline ll of liig. 1.

Fig. is a view similar to that shown in Fig. 1, but illustrating; theswitch mechaf nisrn in the olf position, and

Fig. fl is a perspective View of a switch. of this invention showing thesame in operative position upon the rear side of the switch board.V

Continuing now, by way of4 a more detailed analysis ofthe primarycharacteristics of this invention, A designates a board of insulatingmaterial, as of slate, marble or the like, which forms the front exposedfa'ce of the panel carrying the operatinghandles and on the rear-side ofwhich are mounted the various parts arranged in accordance with thisinvention. A branch line contact carrier B vis spaced from the rearsurface of the board and supports a plurality of branch line contacts,l, 2 and 3 together with suitable fuses 4t, 5 and 6 which are connectedwith branch line wires 7, 8 and 9,' said wires'being` supported bythecarrier B.

Bus bars, ai, jz/ and e are supported at the rear surface of the board Ain spaced relan tion to each other one for each of the contacts l, 2 and3.

The switch blades G, G and G are supported by the carrier C which ismade up of a strip of sheet metal bent to form opposite clamp plates 25and 26 between which the switch blades are clamped in spacedsubstantially parallel relation. The carrier ex# tends transversely ofthe blades substantially midway of their length as clearlyl HOV - theposition shown by Fig. l,

dependently formed and attached to the base board so thatl they may beemployed.

or supporting switch blade. carriers of vary'- ing lengths.

The switch blades are iiexible so that When pressed into engagement withthe bus bars and branch line contacts they are caused to lien to agreater or less extent and thereby to store energy Within themselvestending to return the carrier'to the oil position. A coil spring 28 hasone of its ends 17 xed to the extension l0, as by being received Withina transverse opening 18, and has its other end, as 19 xed to the'support12 as by being received Within an aperture 20. rlfhis spring is arrangedand tensioned to urged the carrier and switch blade into full olfposition.

The ends of the clamp plates forming the carrier C adjacent the support12 are bent at right angles as at 15 so as to constitute a laterallyextending arm for the carrier by means of which the carrier may be swungfrom an operating handle I at the front of the hoard: The bent ends ofthe plates are` spaced apart to receive a link CZ which isconnected'thereto by a pin c, said link constituting one element of atoggle. The other element of the 'toggle is iade up of. two links c and,t Which are pivotally connected at one end to the support 12 by a pin aand at theother endto the free end of the link al by a pivot pin oconstituting the knuckle of the toggle. The parts are so proportionedthat when the links al and e have assumed (the pivot being slightlyoverthrown beyond the center line ato c), the switch blades G, G and Gwill press tightly against` theirresp'ective contactsso as to "springthe parts as shown in Fig. 1. A suitable means for limiting movement ofthe toggle in its made and broken positions such as the stop pins and 31may be provided, or'the supporting plate 12 may -be formed with anarcuate slot 21 into which one end of the pivot pin b extends, theopposite end Walls of the 'slot constituting stops against which the pinb engages. This arrangement is combined with a lost motionoperatingdevice constructed in such va manner that the instant thetoggle is broken, the lost motionwillprovide for a free and unimpededcontinuation of the movement of the toggle in its collapsing directionunder 1the impulse of the` spring 28, augmented momentarily at thebeginning of the throvi7 bythe reaction of the flexed-blades G, G and G.The eect of this is to cause an exceedingly abrupt break, since thespring tension is greatest a fevv degrees prior to the actualdisconnecting station and when the greatest force is needed to overcomethe'momentum or inertia of the. parts. The spring 284 will complete thethrow of the parte and bring the knowledge readily adapt gLacasse toggleinto its collapsed state with the switch blades in an. intermediateposition substantiallyas shown in Fig. 3.

The lost-motion device may embody a member providing a portion h servingas a contactsurface adapted to advance and -press against pivot tor'other suitable part associated with the toggle, so that after itscontact has been established, the toggle Will positively .be moved sothat the pin may cross the centerline and be able thereupon to travelfreely and Without restriction in the idle motion in the'part H so thatwhen the surface 7L unbreaks the toggle, the surface ic Will not impedeits collapsing. The member H may, in turn, be actuated in any suitablemanner, manually or otherwise, as by means of a hand-lever I pivoted at32 to a support secured to the outer face of 'the insulating-board A andpivoted at 34 or otherwise connected to the part H so that in oneposition of the handle l, say in its vertical, the toggle will be closedto establish contact throughl the switch-blade` and in its votherposition the toggle will be broken to -disestablish the electricalconnection.

Without further analysis, the foregoing will so fully reveal the gistofthis invention that others can by applying current it forvariousapplications Without omitting certain features that from thestandpointof the prior art faiixy constitute essential characteristics ci thegeneric or specific aspects of this invention, 4and therefore, suchadaptations should and are intended to be comprehended Within themeaning andl range of equivalency of the' following claims; f

Having thus revealed this invention, I claim as nevr and desire tosecure the following combinations ofA elements, or equivalents, thereof,by Letters Patent of the United States:

1. 1n a switch mechanism for dead-face which they coperate as to providesucient i boards, the combination comprising a double 'ended switchmember which is pivotally mounted intermediate lits ends to swing saidends simultanconsly for disposing them into and out of 4eng'anientwithsuitably spaced contact members, supporting means for the switchmember of a. character to support the switchl member from one surface ofa suitable board with the pivotal axis arrangd so that one end' of theswitch member will ting the several switch blades to swing in swingoutwardly away from a suitable contact which may be carried by theadjacent surface portion of said board while the 0ppositc end of theswitch member swings inwardly toward the board and out of engagementwith a contact which may be spaced from the board, an operating armfixed to the switch member projecting laterally therefrom in a planesubstantially at right angles to the board by means of which the switchmember may be swung, toggle means for swinging said arm comprising apair of links pivotally connected together and to said support and armto oscillatel substantially in said mentioned plane, together with anactuating member associated with the toggle also movable in saidmentioned plane adapted to extend from the toggle through the board foractuating the toggle from the opposite side of the board.

2. In combination, a plurality of switch blades, a carrier for theswitch blades comprisin'g a member extending transversely of the switchblades and having means to retain the switch blades fixed theretotoextend laterally therefrom spaced apart along the length of the carrier,pivotal extensions provi-ded at the oppositeends of the carrier by meansof which the carrier may be pivotally supported to provide meanspermitunison into and out of engagement with appropriately arrangedcontact members, supporting means for said extensions, a spring forswinging the carrier and blades in one direction, one of said pivotextensions having a transverse aperture formed therein rev ceiving oneend of the spring, the opposite end of the spring engagingthe support,and means operatively connected with the carrier to swing the same atwill against the tension of the spring inthe other direction. 3. Incombination, a plurality of switch blades, a carrier for the switchblades coinprising opposite clamp plates from between which the switchblades laterally extend, said clamp plates holding the switch bladesspaced apart along the length of the clamp plates, insulating meansinsulating the switch blades from each other and from the clamp plates,pivotal extensions provided at arranged contact members, supportingmeans for said extensions, means engaging between one of said extensionsand said supporting Copie o!- thi: patent may be obtained for means forurging said carrier in one direction, and means operatively connectedwith the carrier to swing the same at will in the other direction.

i. A switch mechanism comprising a pivotally 'mounted switch bladecarrier, a sup.- port therefor, a flexible switch lblade' carried by thecarrier yextending laterally from the pivotal axis thereof, said switchblade having its outer end adapted to be swfung into and out of surfaceengagement with a suitable contact member, an operating arm alsoextending laterally from the pivotal axis of the carrier by means ofwhich the carrier and switch blade may be swung, a toggle -connectedwith sa'id arm movable into made and broken positions for actuating saidarm. the switch blade being adapted to be flexed against the contactwhen the toggle is made, means to move the toggle from made position andpermitting unobstructed movement of the toggle to full broken position,the energy in the switch blade being effective when the toggle is movedout of made position for moving the switch. blade in a direction awayfrom the contact, and a spring engaging between said support and aportion of said carrier for insuring swinging movement of said carrierand switch blade to full off position. Y

5. A switch mechanism comprising. a pivotally mounted switch blade, asupporting tions, andthe opposite end walls of said-slot constitutingstops against which the'pivot pin engages to limit movement of thetoggle in its two positions.

In witness whereof, I hereunto subscribe my name, as attested by the twosubscribing witnesses.

HUBERT F. KRANTZ..

Witnesses:

S. L. WHEELocx, JOHN L. KoLLE.

ave eents each, by addressing the Commissioner e! Patents. Washington,D. 0.,

'means connected to said pivot pin for actuating the toggle into madeand broken posi-

